Thread: Lecture videos with increased playback speed and pitch correction

hi, convert video increased or decreased playback speed , and pitch correction, using mencoder (amd64 arch.).

tutorial:
http://eeff0c.blogspot.com/

$ sudo apt-get install tap-plugins

commands don't work (mplayer):

mplayer -speed 0.8 -af ladspa=/usr/lib/ladspa/tap_pitch.so:tap_pitch:0:25:-90:0 file.mp3


mencoder - see script following link - doesn't work, same issue.


error:
couldn't find audio filter 'ladspa'
[libaf] couldn't create or open audio filter 'ladspa'
error @ audio filter chain pre-init!


set in .bashrc:
export ladspa_path=$ladspa_path:/home/alex/.ladspa:/usr/local/lib/ladspa:/usr/lib/ladspa


idea?

found post:

hi,
use ubuntu on amd64 ardour , tap plugins did not work. months ago recompiled them , got them working switching compiler option , mailed tom gave me solution. here part of mail tom szilagyi:

>hi steve,

>could achieve same effect adding
>-fno-strict-aliasing gcc options, instead of above?

>i interested in simplest solution.

>so change 1 line in makefile to:
>cflags = -i. -o3 -wall -fomit-frame-pointer
>-fstrength-reduce -funroll-loops -ffast-math -fno-strict-aliasing -c
>-fpic -dpic

>(i added -fno-strict-aliasing end of -f* list)

>could confirm if works same solution?

>thanks,
>tom

helped me , work lot these plugins have parametric equalizer.

have similar problems holap plugins (exciter !!) on ardour - still don't work in ardour in jackrack detected now. non-working ardour plugin start jackrack , insert main channel of mixer, connecting outs/ins jackrack, load desired plugins jackrack , test them.

best wishes,
steve

source:http://ardour.org/node/3002

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